Danny's Car Accessories

Is BMW’s E46 Harman Kardon stereo better than Sony’s CDX-F5700?

I’m about to purchase a 2004 BMW 330ci convertible with a Harman Kardon stereo. In my current car, I have a Sony CDX-F5700 (http://tech.yahoo.com/ps/sony-cdx-f5700/1991398705). Should I replace the Harman Kardon with the Sony? Or is the Sony stereo better? Thanks!
Oops, the URL for the Sony CDX-F5700 didn’t work. Here’s the correct URL for it:

Keep the Harman Kardon, its by far better than sony!!!!! Harman Kardon is a excellent audio company, its owned by JBL. Its right up there with Bose.